<template>
	<div class="login-container">
		<el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" auto-complete="on"
			label-position="left">
			<!-- model用于收集表单数据 rules表单校验 -->
			<div class="title-container">
				<h3 class="title">登录</h3>
			</div>

			<el-form-item prop="username">
				<span class="svg-container">
					<svg-icon icon-class="user" />
				</span>
				<el-input ref="username" v-model="loginForm.username" placeholder="Username" name="username" type="text"
					tabindex="1" auto-complete="on" />
			</el-form-item>

			<el-form-item prop="password">
				<span class="svg-container">
					<svg-icon icon-class="password" />
				</span>
				<el-input :key="passwordType" ref="password" v-model="loginForm.password" :type="passwordType"
					placeholder="Password" name="password" tabindex="2" auto-complete="on"
					@keyup.enter.native="handleLogin" />
				<span class="show-pwd" @click="showPwd">
					<svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
				</span>
			</el-form-item>

			<el-button :loading="loading" type="primary" style="width: 100%; margin-bottom: 30px"
				@click.native.prevent="handleLogin">登录</el-button>

			<div class="tips">
				<span style="margin-right: 20px">username: admin</span>
				<span> password: any</span>
			</div>
		</el-form>
	</div>
</template>

<script>
	import {
		validUsername
	} from "@/utils/validate";

	export default {
		name: "Login",
		data() {
			const validateUsername = (rule, value, callback) => {
				if (!validUsername(value)) {
					callback(new Error("Please enter the correct user name"));
				} else {
					callback();
				}
			};
			const validatePassword = (rule, value, callback) => {
				if (value.length < 6) {
					callback(new Error("The password can not be less than 6 digits"));
				} else {
					callback();
				}
			};
			return {
				loginForm: {
					username: "admin",
					password: "111111",
				},
				loginRules: {
					username: [{
						required: true,
						trigger: "blur",
						validator: validateUsername
					}, ],
					password: [{
						required: true,
						trigger: "blur",
						validator: validatePassword
					}, ],
				},
				loading: false,
				passwordType: "password",
				redirect: undefined,
			};
		},
		watch: {
			$route: {
				handler: function(route) {
					this.redirect = route.query && route.query.redirect;
				},
				immediate: true,
			},
		},
		methods: {
			showPwd() {
				if (this.passwordType === "password") {
					this.passwordType = "";
				} else {
					this.passwordType = "password";
				}
				this.$nextTick(() => {
					this.$refs.password.focus();
				});
			},
			handleLogin() {
				// 登陆业务
				this.$refs.loginForm.validate((valid) => {
					if (valid) {
						this.loading = true;
						this.$store
							.dispatch("user/login", this.loginForm)
							// 派发user下login的action 带上参数loginForm
							.then(() => {
								this.$router.push({
									path: this.redirect || "/"
								});
								// 登录成功 进行路由跳转
								this.loading = false;
							})
							.catch(() => {
								this.loading = false;
							});
					} else {
						console.log("error submit!!");
						return false;
					}
				});
			},
		},
	};
</script>

<style lang="scss">
	/* 修复input 背景不协调 和光标变色 */
	/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

	$bg: #283443;
	$light_gray: #fff;
	$cursor: #fff;

	@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
		.login-container .el-input input {
			color: $cursor;
		}
	}

	/* reset element-ui css */
	.login-container {
		.el-input {
			display: inline-block;
			height: 47px;
			width: 85%;

			input {
				background: transparent;
				border: 0px;
				-webkit-appearance: none;
				border-radius: 0px;
				padding: 12px 5px 12px 15px;
				color: $light_gray;
				height: 47px;
				caret-color: $cursor;

				&:-webkit-autofill {
					box-shadow: 0 0 0px 1000px $bg inset !important;
					-webkit-text-fill-color: $cursor !important;
				}
			}
		}

		.el-form-item {
			border: 1px solid rgba(255, 255, 255, 0.1);
			background: rgba(0, 0, 0, 0.1);
			border-radius: 5px;
			color: #454545;
		}
	}
</style>

<style lang="scss" scoped>
	$bg: #2d3a4b;
	$dark_gray: #889aa4;
	$light_gray: #eee;

	.login-container {
		min-height: 100%;
		width: 100%;
		background: url(~@/assets/vlop.jpg);
		// background-size: 100% 100%;
		overflow: hidden;

		.login-form {
			position: relative;
			width: 520px;
			max-width: 100%;
			padding: 160px 35px 0;
			margin: 0 auto;
			overflow: hidden;
		}

		.tips {
			font-size: 14px;
			color: #fff;
			margin-bottom: 10px;

			span {
				&:first-of-type {
					margin-right: 16px;
				}
			}
		}

		.svg-container {
			padding: 6px 5px 6px 15px;
			color: $dark_gray;
			vertical-align: middle;
			width: 30px;
			display: inline-block;
		}

		.title-container {
			position: relative;

			.title {
				font-size: 26px;
				color: $light_gray;
				margin: 0px auto 40px auto;
				text-align: center;
				font-weight: bold;
			}
		}

		.show-pwd {
			position: absolute;
			right: 10px;
			top: 7px;
			font-size: 16px;
			color: $dark_gray;
			cursor: pointer;
			user-select: none;
		}
	}
</style>
